Umbrella holder



FIG. 1 is a front left perspective view of an umbrella holder showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof; and

FIG. 4 is a rear elevational view.

The right side is the mirror image of the left side as depicted. 

The ornamental design for an umbrella holder, as shown and described. 